html_unescape 0.1.4

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  • Changelog
  • Example
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  • 49

html_unescape #

A Dart library for unescaping HTML-encoded strings.


  • Named Character References ( )
    • 2099 of them
  • Decimal Character References (á)
  • Hexadecimal Character References (ã)

The idea is that while you seldom need encoding to such a level (most of the time, all you need to escape is <, >, /, & and "), you do want to make sure that you cover the whole spectrum when decoding from HTML-escaped strings.

Usage #

A simple usage example:

import 'package:html_unescape/html_unescape.dart';

main() {
  var unescape = new HtmlUnescape();
  var text = unescape.convert("&lt;strong&#62;This &quot;escaped&quot; string");

You can also use the converter to transform a stream. For example, the code below will transform a POSIX stdin into an HTML-unencoded stdout.

await stdin
    .transform(new Utf8Decoder())
    .transform(new HtmlUnescape())
    .transform(new Utf8Encoder())

Full versus small #

If you're sure you will only encounter the most common escaped characters, you can import 'package:html_unescape/html_unescape_basic.dart' instead of the full version. This will decrease code size and increase performance. The only difference is in the size of the Named Character Reference dictionary. The full set includes the likes of &DownLeftRightVector; or &UpArrowBar; while the small set only includes the first 255 charcodes.

Issues #

Please use GitHub tracker. Don't hesitate to create pull requests, too.

Changelog #

0.0.1 #

  • Initial version


// Copyright (c) 2016, Filip Hracek. All rights reserved. Use of this source
// code is governed by a BSD-style license that can be found in the LICENSE
// file.

import 'package:html_unescape/html_unescape.dart';

void main() {
  var unescape = new HtmlUnescape();
  print(unescape.convert("&lt;strong&#62;This &quot;escaped&quot; string "
      "will be printed normally.</strong>"));

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  html_unescape: ^0.1.4

2. Install it

You can install packages from the command line:

with pub:

$ pub get

Alternatively, your editor might support pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:html_unescape/html_unescape.dart';
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Support Dart 2 in pubspec.yaml.

The SDK constraint in pubspec.yaml doesn't allow the Dart 2.0.0 release. For information about upgrading it to be Dart 2 compatible, please see


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=1.0.0 <2.0.0